<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    function f(name,age) {
        alert(name+":"+age);
    }
    f("晚饭",25)
    function f1() {
        alert("f5");
    }
    f1();
    function f2() {
        return "asdd1";
    }
    let si=f2();
    alert(si);

    function f3(y,x) {
        return x*y;
    }
    let s5=f3(5,8);
    alert(s5);
    let f8=function (x,y) {
        alert(x+y);
    }
    f8(8,63);
    let s8=new Function("x","y","alert(x+y)")
    s8(8,9)
</script>
</body>
</html>